Difficulty: Medium
Correct Answer: SRPQ
Explanation:
Given data
Concept/Approach
 Use contrast (despite squalor, beauty) then detail tourists' reactions and hurdles overcome. 
Step-by-step reasoning
 S follows S1 with a concession: the city still looked beautiful. R provides the reason for the attraction—fresh snow. P shows their persistence despite slush. Q closes the tourist perspective: slips were a small price. 
Verification
 The sequence sets up S6 as a contrasting, sobering closing image. 
Common pitfalls
 Starting with R misses the explicit concessive link introduced by S. 
Final Answer
 SRPQ 
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